What is the best way to get an overdrive auto in a 67 Barracuda?

Carnut76 said

I don't want to sound obtuse here but your converter is a 3600, when you are cruisin trying to keep the rpms down say under 2600 does your converter heat up or stall or does the "lockup" part of the converter prevent that? I'm not sure exactly how that works, I would like a 2800 stall but I don't want it slipping or causing excess heat at cruising speed. Does your lockup work on a switch or does it kick in automatically?

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The lockup function essentially is a clutch that engages and takes any slip out of the converter. You cannot go full throttle with this engaged unless you have a triple disk setup. Most are single disk like mine. You can set it up to automatically engage or use a controller or use a switch to turn it on and off manually. Mine is wired so that I flip the switch and engage it only when I want it to.

And to your comment about anyone who has a 727 will know what you're talking about, most here run a 727 including me currently. I run 4.10 gears and a 5500 stall and still running less rpm on the highway than you. Shouldn't be that way. That's all I'm saying.